If that were the case, I would expect him to He didn't, and therefore I discount this theory.
Respectfully, the officer arrives back up to the car at
@840 mark. Officer
@8:46 mark (*after observing for 6 sec) he ask "YOU OK"?
SB : tells him she waiting on him, he states You seem very irritated, and then goes thru why she is.. he didn't ask her why she was irritated, and when she stops talking he asks her are you done, then ...
@9:17
Officer: "you mind putting out your cigarette, please, if you don't mind"
SB : I'm in my car, why do I have to put out my cigarette
Officer: Well you can step on out now
SB: I don't have to step out of my car
Officer: Step out of the car
Goes down hill from there.... by 9:46 he tells her as he has opened the door Step out or I will remove you, *he said step out multiple times
by 9:56 she is going to call her lawyer, and he is reaching in car
So up until that time (1 min and 16 sec right?) JMHO, the first 6 seconds of observation he did "act in a compassionate, supportive and understanding manner", after he asked her "you ok" which he had to have a reason to ask that, and he says to her she seems very irritated. In that whole first 1 min 16 seconds, JMHO of course but how was the Officer anything but doing his duty? I ask this honestly and sincerely.
ETA link to video
http://www.latimes.com/nation/la-na-texas-new-sandra-bland-video--20150722-story.html#page=1